Connecting sleeve for burners and hot-blast stoves



C. M. GUY

March 27, 1951 CONNECTING SLEEVE FOR BURNERS AND HOT-BLAST STOVES Filed May 5, 194

m a N \N f w \N v V E (m m w. 4% w m Q .7. -nmE m 1 QM QM E 2 N w N N Q 7 E Q J Kw x mm QR m \M \Q N Q f llllll N\ & E VW v 3% NR Patented Mar. 27, 1951 CONNECTING SLEEVE FOR BURNERS AND HOT-BLAST STOVES Charles M. Guy, Pittsburgh, Pa., assignor to United States Steel Company, a corporation of New Jersey Application May 5, 1948, Serial No. 25,128

1 Claim. 1

This invention relates to burners for hot blast stoves and the like and more particularly to a" sleeve for connecting such burners to the hot blast stoves.

Hot blast stoves that are used to heat the air for blast furnaces are large structures substantially filled with refractory checkerwork. This checkerwork is alternately heated when the stove is on gas by burning the waste blast furnace gases and then used to heat the air supplied to the blast furnace when the stove is on blast. The burner for heating the stove is retracted from the stove port when the stove is on blast. Due to the alternate heating and cooling of the large volume of checkerwork, the stove is subject to strains which cause misalignment of the burner and the port. Since this permits the escape of harmful gases, it is desired to provide means for connecting the burner to the stove which is substantially gas tight.

It is accordingly an object of the present invention to provide a sleeve for connecting burners to hot blast stoves which automatically compensates for misalignment of the stove port and the burner.

The foregoing and further objects will be apparent from the following specification when read in conjunction With the attached drawing, wherein:

Figure 1 is a fragmentary side elevation, partly in section, of a burner for hot blast stoves and the adjacent stove port, said burner embodying the connecting sleeve of my invention;

Figure 2 is a sectional view of the sleeve and port in engaged position; and

Figure 3 is a similar view showing the sleeve compensating for misalignment.

Referring more particularly to the drawing, the numeral 2 designates a conventional hot blast stove having a port 4 surrounded by a flange 6. Disposed in alignment with the port A is a burner 8 composed of an inner conduit l connected to a source of gas, such as waste gases, from a blast furnace and a surroundin conduit l2through which air under pressure is supplied by motor M and fan IS. The air and the gas are thoroughly mixed due to turbulence created by baffles l8 and 20.

In accordance with the teachings of my invention, the burner 8 is connected to the port flange 6 by a sleeve 22. In order to connect the burner to the port flange 6, either the sleeve 22 is retractible by being slidably mounted on the conduit E2 or the whole burner 8 is retractible on its base 24. The sleeve 22 has a raised annular ring 26 with a convex outer surface 28 adjacent its outer end 30. The outer end 30 is enlarged somewhat relative to the body portion of the sleeve and has a groove 32 intermediate the end and the ring 26 for a purpose to be later described. Disposed around the ring 26 is an outerring 34 having a concave inner surface 35 adapted to engage the convex outer surface 28 of the inner ring 26. The outer ring 34 is preferably made in tWo sections 38a and 382) so that it can be suitably assembled on the inner ring and is adapted to be held together by bolts 4!). The outer section 38a carries an extension or flange 42 which is adapted to abut and engage the flange 6 to provide a gas-tight seal therebetween.

By reference to Figure 3 it is seen that the movement of the outer ring on the inner ring will compensate for misalignment of the port flange 6 relative to the burner when the sleeve 22 is moved into on gas position. Due to the groove 32, considerable relative movement between the two rings is permitted. At the same time the end portion 3!) will contact the inside of the flange 42 to hold the outer ring and flange in suitable position to engage the flange 6.

While I have shown and described one specific embodiment of my invention, it will be understood that this embodiment is merely for the purpose of illustration and description and that various other forms may be devised Within the scope of my invention, as defined in the appended claim.

I claim:

In a retractible burner for a hot blast stove port, a sleeve on said burner for connecting it to said port and means on said sleeve for compensating for misalignment of said burner and said port, said means comprisin a raised circumferential ring on said sleeve near the outer end thereof, said ring having a convex outer sur face, an outer ring disposed around said firstmentioned ring having a concave inner surface engaging said convex surface, said outer ring having a flange adapted to engage said port, the outer end portion of said sleeve being enlarged and having a circumferential groove intermediate its outer end and the ring thereon, said groove permitting relative movement between said outer ring and said inner ring, the end of said sleeve being adapted to engage the inside of the flange on said outer ring to hold same in position when said sleeve is retract-ed from said port.

CHARLES M. GUY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

